feature request: advanced options for decklink devices

[lvqier]

Summary of the bug:
I can not use ffmpeg to capture HDMI signal using DeckLink Mini Recorder while there's no way to set bmdDeckLinkConfigVideoInputConnection and bmdDeckLinkConfigAudioInputConnection.

But ​bmdcapture can.

How to reproduce:

List of input formats:

#./ffmpeg -f decklink -list_formats 1 -i 'DeckLink Mini Recorder'ffmpeg version 2.8.1 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.2 (Debian 4.9.2-10)
  configuration: --prefix=../build --enable-gpl --enable-version3 --enable-decklink --disable-filter=showcqt --enable-libx264 --enable-libvo_aacenc --extra-cflags=-I../../include/ --extra-libs=-ldl
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
[decklink @ 0x31e8380] Supported formats for 'DeckLink Mini Recorder':
[decklink @ 0x31e8380] 	1	720x486 at 30000/1001 fps (interlaced, lower field first)
[decklink @ 0x31e8380] 	2	720x486 at 24000/1001 fps
[decklink @ 0x31e8380] 	3	720x576 at 25000/1000 fps (interlaced, upper field first)
[decklink @ 0x31e8380] 	4	720x486 at 60000/1001 fps
[decklink @ 0x31e8380] 	5	720x576 at 50000/1000 fps
[decklink @ 0x31e8380] 	6	1920x1080 at 24000/1001 fps
[decklink @ 0x31e8380] 	7	1920x1080 at 24000/1000 fps
[decklink @ 0x31e8380] 	8	1920x1080 at 25000/1000 fps
[decklink @ 0x31e8380] 	9	1920x1080 at 30000/1001 fps
[decklink @ 0x31e8380] 	10	1920x1080 at 30000/1000 fps
[decklink @ 0x31e8380] 	11	1920x1080 at 25000/1000 fps (interlaced, upper field first)
[decklink @ 0x31e8380] 	12	1920x1080 at 30000/1001 fps (interlaced, upper field first)
[decklink @ 0x31e8380] 	13	1920x1080 at 30000/1000 fps (interlaced, upper field first)
[decklink @ 0x31e8380] 	14	1280x720 at 50000/1000 fps
[decklink @ 0x31e8380] 	15	1280x720 at 60000/1001 fps
[decklink @ 0x31e8380] 	16	1280x720 at 60000/1000 fps

But ffmpeg complains with No input signal detected by selecting whichever format:

#./ffmpeg -f decklink -i 'DeckLink Mini Recorder@15' -acodec libvo_aacenc -vcodec libx264 -pix_fmt yuv420p b.mp4
ffmpeg version 2.8.1 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.2 (Debian 4.9.2-10)
  configuration: --prefix=../build --enable-gpl --enable-version3 --enable-decklink --disable-filter=showcqt --enable-libx264 --enable-libvo_aacenc --extra-cflags=-I../../include/ --extra-libs=-ldl
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
[decklink @ 0x2578420] Found Decklink mode 1280 x 720 with rate 59.94
[decklink @ 0x2578420] Frame received (#1) - No input signal detected - Frames dropped 1
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, decklink, from 'DeckLink Mini Recorder@15':
  Duration: N/A, start: 0.000000, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
    Stream #0:1: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, -10 kb/s, 59.94 tbr, 1000k tbn, 59.94 tbc
[libx264 @ 0x25814e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[decklink @ 0x2578420] Frame received (#2) - Input returned - Frames dropped 2
[libx264 @ 0x25814e0] profile High, level 3.2
[libx264 @ 0x25814e0] ....

[lvqier]

I have tested with the latest DeckLink SDK, the Configuration interface is not needed for audio and video input connections. But not sure for other options.

[astroza]

Hi, I fixed that issue of lacking of options here

​https://github.com/FFmpeg/FFmpeg/pull/212

you could help me leaving positive comments in pull request :D

[Carl Eugen Hoyos]

Please send patches made with git format-patch to the development mailing list, pull requests are usually ignored.

[Marton Balint]

Support for selecting audio and video input connection, as well as duplex mode has been added to git master. Reopen if something still does not work.